Revert to celery 4.4.2 (#343)

Mariatta · web-flow · commit 4e890234cd84 · 2020-06-04T10:01:26.000-07:00
Fix #342
diff --git a/requirements.txt b/requirements.txt
@@ -3,5 +3,5 @@ aiohttp==3.6.2
 gidgethub==4.1.0
 cachetools==4.1.0
 redis==3.5.3
-celery==4.4.4
+celery==4.4.2
 sentry-sdk==0.14.4
